• DocumentCode
    626007
  • Title

    Emission energy barriers of scandate surfaces with adsorbed Ba and Ba-O using density functional theory

  • Author

    Jacobs, Ryan M. ; Morgan, D. ; Booske, John H.

  • Author_Institution
    Mater. Sci. Program Dept., Univ. of Wisconsin-Madison, Madison, WI, USA
  • fYear
    2013
  • fDate
    21-23 May 2013
  • Firstpage
    1
  • Lastpage
    2
  • Abstract
    Density functional theory was used to calculate the surface electron emission barriers for the stable (011) and (111) surfaces of bixbyite Sc2O3 in the presence of adsorbed Ba and Ba-O. A low surface barrier of 1.21 eV for a defected BaO monolayer on Sc2O3 (011) was found to be thermodynamically stable. This result provides a straightforward explanation of low effective work function measurements obtained for scandate cathodes.
  • Keywords
    cathodes; density functional theory; electron emission; scandium compounds; Sc2O3; density functional theory; electron volt energy 1.21 eV; emission energy barriers; scandate cathodes; scandate surfaces; surface electron emission barriers; Barium; Cathodes; Density functional theory; Doping; Electron emission; Jacobian matrices; Temperature measurement; density functional theory; scandate cathode; scandium oxide; surface barrier; work function;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International
  • Conference_Location
    Paris
  • Print_ISBN
    978-1-4673-5976-4
  • Type

    conf

  • DOI
    10.1109/IVEC.2013.6570975
  • Filename
    6570975
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=626007